Water Quality in San Antonio, TX
Detailed water quality data for San Antonio, Texas including contaminant levels, EPA comparisons, AquaScore™ grading, and treatment recommendations.
Water utility: San Antonio Water System (SAWS).
Water source: Edwards Aquifer (groundwater).
Key Contaminants Found
- Haloacetic acids (HAA5)
- Total trihalomethanes (TTHMs)
- Arsenic
- Radium-226 & -228
- Fluoride
San Antonio draws from the Edwards Aquifer, one of the most productive artesian aquifers in the world. While naturally filtered through limestone, the water picks up naturally occurring arsenic and radium.